A wearable heart rate monitoring sensor and a method of manufacturing the same

Abstract

The application provides a wearable heart rate monitoring sensor and a preparation method thereof, wherein a heart rate monitoring component comprises a flexible packaging layer, an ionic gel sensing part, a printed electrode layer and a substrate layer; the heart rate monitoring component is in close and comfortable contact with the surface of human skin through the flexible packaging layer; the ionic gel sensing part serves as a heart rate monitoring functional part and can accurately monitor the heart rate beat state of a human body in real time; the heart rate beat state is converted into a corresponding electrical signal through the printed electrode layer to generate heart rate data; the heart rate data is collected by a control component and transmitted outward by a communication component, so that the heart rate state of the human body is monitored in real time and automatically; the heart rate monitoring component is packaged by the flexible packaging layer, the wearing stability of the sensor and the biocompatibility with the surface of human skin are improved, the wearing comfort of the sensor is improved, and the heart rate monitoring reliability and accuracy of the sensor are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heart rate monitoring devices, in particular to a wearable heart rate monitoring sensor and a preparation method thereof. BACKGROUND

[0002] Heart rate as an important physical parameter, it has important reference significance for the real-time state of the body. Especially in the process of exercise, the heart rate value of human body needs to be obtained in real time, so as to judge whether the human body is in the limit state according to the change of heart rate value, so as to ensure the safety of personnel in the process of exercise. At present, the portable electronic device such as smart watch has the function of heart rate monitoring, which can collect the heart rate data of the wearer in real time, and analyze and process the heart rate data to determine the physical state of the wearer. However, the shell of such smart watch is relatively hard, if the wearer contacts the surface of the watch in the process of long time exercise, there will be a serious uncomfortable feeling; in addition, the watch will not be in close contact with the human skin in the process of exercise, and will slip relative to the human body, thereby reducing the stability of heart rate monitoring. The existing smart watch has poor biocompatibility in heart rate monitoring, and cannot accurately obtain heart rate data. SUMMARY

[0003] In view of the defects of the prior art, the present application provides a wearable heart rate monitoring sensor and a preparation method thereof, wherein the heart rate monitoring assembly includes a flexible packaging layer, an ion gel sensing part, a printed electrode layer and a substrate layer. The heart rate detection assembly is in close and comfortable contact with the surface of human skin through the flexible packaging layer, and the ion gel sensing part serves as a heart rate monitoring functional component, which can monitor the heart rate of human body in real time and accurately. The heart rate jumping state is converted into corresponding electrical signal through the printed electrode layer to generate heart rate data. The control assembly is used to collect heart rate data, and the communication assembly is used to send heart rate data outward, so as to monitor the heart rate state of human body in real time and automatically. The heart rate monitoring assembly is packaged by using the flexible packaging layer, which can improve the wearing stability of the sensor and the biocompatibility with the surface of human skin, improve the wearing comfort of the sensor and ensure the reliability and accuracy of the heart rate monitoring of the sensor.

[0004] The present application provides a wearable heart rate monitoring sensor, which comprises a heart rate monitoring assembly, a communication assembly, a power supply assembly, a control assembly and a wearing assembly,

[0005] The heart rate monitoring assembly comprises a flexible packaging layer, an ion gel sensing part, a printed electrode layer and a substrate layer; the ion gel sensing part is arranged on the flexible packaging layer, and the printed electrode layer is connected with the ion gel sensing part; the substrate layer is arranged above the flexible packaging layer and covers the ion gel sensing part and the printed electrode layer;

[0006] The communication component is arranged above the heart rate monitoring component, and is configured to transmit the heart rate data collected by the heart rate monitoring component outward;

[0007] The power supply component is arranged above the communication component, and is configured to supply power to the communication component and the control component respectively;

[0008] The control component is connected with the communication component and the power supply component respectively, and is configured to transmit the heart rate data collected by the heart rate monitoring component to the communication component;

[0009] The wearing component is arranged on the sensor, and is configured to wear the sensor on the corresponding part of the monitoring object.

[0010] Further, the flexible encapsulation layer is composed of at least one of PDMS, Eco-Flex and thermoplastic polyurethane;

[0011] A plurality of openings are formed on the flexible encapsulation layer, and each opening is provided with an ion gel sensing part.

[0012] Further, the ion gel sensing part comprises a flexible piezoresistive material, and a plurality of silica microspheres are dispersed in the flexible piezoresistive material.

[0013] Further, the printed electrode layer is a patterned screen-printed electrode layer.

[0014] The patterned screen-printed electrode layer comprises a plurality of sensing pattern electrodes which are the same in number as the ion gel sensing parts, each sensing pattern electrode comprises a comb-shaped electrode part and a strip-shaped electrode part, and the comb-shaped electrode part is in direct contact with the ion gel sensing part.

[0015] The patterned screen-printed electrode layer further comprises a common pattern electrode which is connected with each sensing pattern electrode respectively.

[0016] Further, the patterned screen-printed electrode layer is formed on the base layer by screen printing of a conductive ink material.

[0017] The conductive ink material is any one of gold-based conductive ink, silver-based conductive ink, copper-based conductive ink and carbon-based conductive ink.

[0018] The base layer is a PET flexible base layer.

[0019] Further, the communication component is a Bluetooth communication component, and a pin of the Bluetooth communication component is in welded contact with the control component.

[0020] Furthermore, the power supply component includes a button battery, which is connected to the communication component and the control component for power supply.

[0021] Furthermore, the control components include a main control chip, a power module, a crystal oscillator module, and a reset and indication module;

[0022] The main control chip is connected to the patterned screen-printed electrode layer and is used to transmit the heart rate data generated by the heart rate monitoring component to the communication component.

[0023] The power module is a voltage regulator chip, which is connected to the power supply component and supplies power to the main control chip;

[0024] The crystal oscillator module is a passive crystal oscillator module, which is used to provide clock signals to the main control chip;

[0025] The reset and indicator module is connected to the main control chip and is used to reset and restart the main control chip and to indicate the operating status of the main control chip with lights.

[0026] Furthermore, the wearing component is a flexible bandage with Velcro.

[0027] The present invention also provides a method for preparing a wearable heart rate monitoring sensor, characterized in that it includes the following steps:

[0028] Step S1: A flexible encapsulation layer is made using a flexible material, and at least one opening is formed on the flexible encapsulation layer; ion gel is injected into each opening, thereby forming an ion gel sensing part on each opening;

[0029] Step S2: A base layer is made of a flexible material, and a printed electrode layer is formed on one side surface of the base layer by screen printing; then the flexible encapsulation layer and the base layer are stacked together so that the printed electrode layer is in direct contact with the ion gel sensing part, thereby forming a heart rate monitoring component;

[0030] Step S3: Solder the control component to the printed electrode layer of the heart rate monitoring component, and connect the control component to the communication component;

[0031] Step S4: Connect both the control component and the communication component to the power supply component, so that the heart rate monitoring component, the communication component and the power supply component are stacked sequentially from bottom to top;

[0032] Step S5: The wearable component is placed on the sensor to enable the sensor to be worn repeatedly.

[0033] Compared to existing technologies, the wearable heart rate monitoring sensor and its fabrication method of the present invention include a heart rate monitoring component comprising a flexible encapsulation layer, an ion gel sensing element, a printed electrode layer, and a base layer. The heart rate detection component makes close and comfortable contact with the human skin surface through the flexible encapsulation layer. The ion gel sensing element, as a heart rate monitoring functional component, can accurately monitor the human heart rate in real time. The printed electrode layer converts the heart rate state into a corresponding electrical signal to generate heart rate data. The control component collects the heart rate data, and the communication component transmits the heart rate data outward, thereby enabling real-time automatic monitoring of the human heart rate state. By using a flexible encapsulation layer to encapsulate the heart rate monitoring component, the wearability and biocompatibility of the sensor with the human skin surface can be improved, thereby enhancing the wearing comfort of the sensor and ensuring the reliability and accuracy of the sensor's heart rate monitoring. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the overall structure of a wearable heart rate monitoring sensor provided by the present invention.

[0036] Figure 2 This is a schematic diagram of the printed electrode layer of a wearable heart rate monitoring sensor provided by the present invention.

[0037] Figure 3 This is a schematic diagram of the main control chip of a wearable heart rate monitoring sensor provided by the present invention.

[0038] Figure 4 This is a schematic diagram of the power module of a wearable heart rate monitoring sensor provided by the present invention.

[0039] Figure 5 This is a schematic diagram of the crystal oscillator module of a wearable heart rate monitoring sensor provided by the present invention.

[0040] Figure 6 This is a schematic diagram of the reset and indication module of a wearable heart rate monitoring sensor provided by the present invention.

[0041] Reference numerals: 1. Heart rate monitoring component; 2. Communication component; 3. Power supply component; 11. Flexible encapsulation layer; 12. Ion gel sensing part; 13. Printed electrode layer; 14. Substrate layer; 111. Opening; 131. Sensing pattern electrode; 132. Common pattern electrode; 1311. Comb-shaped electrode part; 1312. Strip-shaped electrode part. Detailed Implementation

[0042] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0043] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0044] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0045] Please see Figure 1 As shown in the figure, an embodiment of this application provides a wearable heart rate monitoring sensor, which includes a heart rate monitoring component 1, a communication component 2, a power supply component 3, a control component, and a wearing component (not shown). The heart rate monitoring component 1, the communication component 2, the control component, and the power supply component 3 are stacked sequentially from bottom to top to minimize the size of the wearable heart rate monitoring sensor. The control component can be integrated with the communication component 2. The wearing component is used to bind the stacked components after the heart rate monitoring component 1, the communication component 2, the power supply component 3, and the control component are stacked together; the wearing component can be, but is not limited to, a flexible bandage with Velcro, facilitating the detachable wearing of the heart rate monitoring sensor on different parts of the user's body.

[0046] The heart rate monitoring component 1 includes a flexible encapsulation layer 11, an ion gel sensing element 12, a printed electrode layer 13, and a base layer 14. The ion gel sensing element 12 is disposed on the flexible encapsulation layer 11, and the printed electrode layer 13 is connected to the ion gel sensing element 12. The base layer 14 is disposed above the flexible encapsulation layer 11 and covers the ion gel sensing element 12 and the printed electrode layer 13. In this way, the ion gel sensing element 12 and the printed electrode layer 13 are encapsulated in the space between the flexible encapsulation layer 11 and the base layer 14, thereby effectively encapsulating and protecting the ion gel sensing element 12 and the printed electrode layer 13.

[0047] The flexible encapsulation layer 11 is composed of at least one of PDMS, Eco-Flex, and thermoplastic polyurethane. This allows the flexible encapsulation layer 11 to possess good flexibility and biocompatibility, enabling it to adhere closely to the skin surface after the sensor is worn, thus improving wearing comfort. The flexible encapsulation layer 11 also has a plurality of openings 111, which can be arranged in an array. Each opening 111 is provided with an ion gel sensing element 12. In practical applications, an ionic liquid can be placed in the opening 111, and the ion gel sensing element 12 is formed when the ionic liquid solidifies. The ion gel sensing element 12 may include, but is not limited to, a flexible piezoresistive material, such as 1-vinyl-3-ethylimidazolium dicyandiamide salt, and the flexible piezoresistive material may contain a plurality of silica microspheres uniformly dispersed within it, thereby improving the heart rate monitoring sensitivity of the ion gel sensing element 12. When a person wears the sensor on their wrist or near their heart, the ionogel sensing part 12 comes into direct contact with the person's skin surface and generates a corresponding sensing signal, thereby achieving the raw acquisition of heart rate data. The thickness of the ionogel sensing part 12 can be, but is not limited to, 1mm-2mm.

[0048] The printed electrode layer 13 serves as a signal connection between the ionogel sensing unit 12 and the control component. It transmits the raw heart rate data collected by the ionogel sensing layer to the control component in the form of an electrical signal, facilitating the control component's processing of the electrical heart rate data. The printed electrode layer 13 can be, but is not limited to, a patterned screen-printed electrode layer 13 formed by printing conductive ink onto the substrate layer 14 using screen printing technology. This maximizes the high conductivity and thin-film nature of the printed electrode layer 13. The conductive ink can be, but is not limited to, any one of gold-based, silver-based, copper-based, and carbon-based conductive inks. The substrate layer 14 can be, but is not limited to, a flexible PET substrate layer 14, which improves the deformability and biocompatibility of the substrate layer 14.

[0049] Please see Figure 2As shown, an embodiment of this application provides a printed electrode layer 13 for a wearable heart rate monitoring sensor. The printed electrode layer 13 can be a patterned screen-printed electrode layer 13. The patterned screen-printed electrode layer 13 includes a plurality of sensing pattern electrodes 131, the same number as the ion gel sensing units 12. Each sensing pattern electrode 131 includes a comb-shaped electrode portion 1311 and a strip-shaped electrode portion 1312. The comb-shaped electrode portion 1311 is in direct contact with the ion gel sensing unit 12. The patterned screen-printed electrode layer 13 also includes a common pattern electrode 132, which is connected to each sensing pattern electrode 131. When the printed electrode layer 13 is stacked on top of the ion gel sensing unit 12, the comb-shaped electrode portion 1311 of each sensing pattern electrode 131 contacts each ion gel sensing unit 12 in a one-to-one correspondence, thereby converting the heart rate data originally collected by the corresponding ion gel sensing unit 12 into an electrical signal. Furthermore, all the strip electrode portions 1312 and common patterned electrodes 132 of the patterned screen-printed electrode layer 13 are connected to the control component, thereby sending the electrical signal corresponding to the heart rate data to the control component.

[0050] Please continue reading. Figure 1 Communication component 2 may be, but is not limited to, Bluetooth communication component 2, which has Bluetooth communication functionality. The pins of Bluetooth communication component 2 are soldered to the control component, allowing the control component to transmit heart rate signals to Bluetooth communication component 2, which then remotely transmits the heart rate signals to smartphones and other smart terminals for processing. Power supply component 3 may be, but is not limited to, a button cell battery, particularly a button lithium battery. Power supply component 3 may be positioned above communication component 2, providing power to both communication component 2 and the control component.

[0051] The control components may include a main control chip, a power supply module, a crystal oscillator module, and a reset and indication module. The main control chip is connected to the patterned screen-printed electrode layer 13 and is used to transmit the heart rate data generated by the heart rate monitoring component 1 to the communication component 2. The power supply module is a regulated power supply chip, connected to the power supply component 3, and supplies power to the main control chip. The crystal oscillator module is a passive crystal oscillator module, used to provide a clock signal to the main control chip. The reset and indication module is connected to the main control chip and is used to perform reset and restart operations on the main control chip and to indicate the operating status of the main control chip with an indicator light.

[0052] Please see Figure 3 As shown in the figure, the main control chip of the wearable heart rate monitoring sensor provided in one embodiment of this application is an STM32F103 main control chip. Its built-in ADC circuit is used to convert the analog signal from the heart rate detection component into a digital signal. One pin of the main control chip is connected to the Bluetooth communication component 2 for transmitting the digital signal to the Bluetooth communication component 2. The pin configuration of the main control chip is as follows: Figure 3As shown, details will not be elaborated here.

[0053] Please see Figure 4 As shown in the figure, an embodiment of this application provides a power module for a wearable heart rate monitoring sensor. The power module is an ASM1117 voltage regulator chip, which is used to provide a regulated voltage to the STM32F103 main control chip. The input terminal IN of the ASM1117 voltage regulator chip is connected to capacitors C5 and C6 in parallel, and is connected to power supply component 3, thereby allowing power supply component 3 to input a 5V voltage to the ASM1117 voltage regulator chip. The output terminal OUT of the ASM1117 voltage regulator chip is connected to capacitors C7 and C8 in parallel, and is connected to pin 24 of the STM32F103 main control chip, used to provide a 3.3V voltage to the STM32F103 main control chip.

[0054] Please see Figure 5 As shown, an embodiment of this application provides a crystal oscillator module for a wearable heart rate monitoring sensor. The crystal oscillator module includes two crystal oscillator circuits, which respectively correspond to... Figure 5 Two circuit structures, one above and one below. The one located at... Figure 5 The circuit structure above connects the two ends of crystal oscillator Y1 to capacitors C1 and C2 respectively before grounding. Furthermore, the two ends of crystal oscillator Y1 are connected in parallel with resistor R1, serving as the oscillation input OSC IN and oscillation output OSC OUT respectively, and are connected to pins 5 and 6 of the STM32F103 main control chip. Figure 5 The circuit structure below connects the two ends of crystal oscillator Y2 to capacitors C3 and C4 respectively before grounding, and the two ends of crystal oscillator Y2 are also connected to pins 3 and 4 of the STM32F103 main control chip respectively.

[0055] Please see Figure 6 As shown, an embodiment of this application provides a reset and indication module for a wearable heart rate monitoring sensor. The reset and indication module includes a reset circuit section and an indication circuit section, which respectively correspond to... Figure 6 The left and right circuits. From Figure 6 As shown in the circuit structure on the left, the reset circuit includes a reset switch KEY. One end of the reset switch KEY is grounded, and the other end is connected to a resistor R2. The reset switch KEY is also connected in parallel with a capacitor C9. One end of the resistor R2 is connected to the STM32F103 main control chip. When the reset switch KEY is pressed, it triggers the STM32F103 main control chip to enter the restart program, thereby restarting the entire heart rate monitoring sensor and restoring it to its factory settings. Figure 6As shown in the circuit structure on the right, the indicator circuit includes a light-emitting diode (LED). One end of the LED is grounded, and the other end is connected to a resistor R3. One end of resistor R3 is connected to the STM32F103 main control chip. When the heart rate monitoring sensor is in normal working condition, the LED will flash. When the heart rate monitoring sensor is in abnormal working condition, the LED will not light up. By observing the LED's illumination status, one can determine whether the heart rate monitoring sensor is working properly.

[0056] In addition, this application also provides a method for fabricating a wearable heart rate monitoring sensor, which includes the following steps:

[0057] Step S1: A flexible encapsulation layer 11 is made of a flexible material, and at least one opening is formed on the flexible encapsulation layer 11; an ion gel is injected into each opening, thereby forming an ion gel sensing part 12 on each opening;

[0058] Step S2: A base layer 14 is made of a flexible material, and a printed electrode layer 13 is formed on one side surface of the base layer 14 by screen printing; then the flexible encapsulation layer 11 and the base layer 14 are stacked together so that the printed electrode layer 13 is in direct contact with the ion gel sensing part 12, thereby forming the heart rate monitoring component 1.

[0059] Step S3: Solder the control component to the printed electrode layer 13 of the heart rate monitoring component 1, and connect the control component to the communication component 2;

[0060] Step S4: Connect both the control component and the communication component 2 to the power supply component 3, so that the heart rate monitoring component 1, the communication component 2 and the power supply component 3 are stacked sequentially from bottom to top.

[0061] Step S5: The wearable component is placed on the sensor to enable the sensor to be worn repeatedly.

[0062] Specifically, in step S1 above, PDMS can be used to fabricate the flexible encapsulation layer 11. For example, 4 ml of PDMS solution is dropped onto a processing mold, with the volume ratio of polydimethylsiloxane to curing agent in the PDMS solution being 10:1. After a certain period of time, the PDMS solution will solidify on the processing mold. The processing mold has several regularly arranged openings, which will create several openings on the solidified flexible encapsulation layer 11. These openings are then used to add ion gel sol to each opening, thereby forming the ion gel sensing part 12.

[0063] In step S1 above, before forming the ion gel sensing part 12 into the opening of the flexible encapsulation layer 11, it is necessary to prepare an ion gel solution, and the preparation process of the ion gel solution is described in several embodiments below.

[0064] Example 1:

[0065] An ionic gel solution was obtained by mixing an ionic liquid, dispersed silica microspheres, and ammonium persulfate and heating the mixture at 70°C for 40 minutes.

[0066] Example 2:

[0067] 5g PVA was mixed with 45g distilled water and stirred on a magnetic stirrer at 95℃ and 600r / min to prepare a 5% PVA solution. Next, 3ml of deionized water and 2g of calcium chloride were stirred, followed by the addition of 1g of starch and thorough stirring. Then, 400ul of the 5% PVA solution was gradually added and stirred thoroughly. Finally, 100ul of PEG solution was added, and the mixture was placed in a vacuum drying oven and vacuum-treated for 5min. Finally, it was heated on a hot plate at 80℃ for 1h to obtain an ionogel solution.

[0068] Example 3:

[0069] First, 10g of PVA was mixed with 45g of distilled water and stirred on a magnetic stirrer at 95℃ and 600r / min to obtain a 5% PVA solution. Next, 3ml of deionized water and 2g of calcium chloride were stirred, followed by the addition of 1g of starch and thorough stirring. Then, 200ul of the 5% PVA solution was gradually added and stirred thoroughly. Finally, 100ul of PEG solution was added, and the mixture was placed in a vacuum drying oven and vacuum-treated for 5min. Finally, it was heated on a hot plate at 80℃ for 1h to obtain an ionomer gel solution.

[0070] Example 4:

[0071] 5g PVA was mixed with 90g distilled water and stirred on a magnetic stirrer at 95℃ and 600r / min to prepare a 5% PVA solution. Next, 3ml of deionized water and 2g of calcium chloride were stirred, followed by the addition of 1g of starch and thorough stirring. Then, 200ul of the 5% PVA solution was gradually added and stirred thoroughly. Finally, 100ul of PEG solution was added, and the mixture was placed in a vacuum drying oven and vacuum-treated for 5min. Finally, it was heated on a hot plate at 80℃ for 1h to obtain an ionogel solution.

[0072] Example 5:

[0073] 5g PVA was mixed with 45g distilled water and stirred on a magnetic stirrer at 95℃ and 600r / min to prepare a 5% PVA solution. Next, 3ml of deionized water and 2g of calcium chloride were stirred, followed by the addition of 1g of starch and thorough stirring. Then, 200ul of the 5% PVA solution was gradually added and stirred thoroughly. Finally, 100ul of PEG solution was added, and the mixture was placed in a vacuum drying oven and vacuum-treated for 5min. Finally, it was heated on a hot plate at 80℃ for 1h to obtain an ionogel solution.

[0074] The above is only one specific embodiment of the present invention, and any improvements made based on the concept of the present invention shall be considered within the scope of protection of the present invention.

Claims

1. A wearable heart rate monitoring sensor, comprising a heart rate monitoring component, a communication component, a power supply component, a control component, and a wearing component, characterized in that: The heart rate monitoring component includes a flexible encapsulation layer, an ion gel sensing element, a printed electrode layer, and a base layer; the ion gel sensing element is disposed on the flexible encapsulation layer, and the printed electrode layer is connected to the ion gel sensing element; the base layer is disposed above the flexible encapsulation layer and covers the ion gel sensing element and the printed electrode layer. The flexible encapsulation layer is composed of at least one of PDMS, Eco-Flex, and thermoplastic polyurethane; The flexible encapsulation layer has a number of openings, and each opening is provided with an ion gel sensing part. The ion gel sensing part includes a flexible piezoresistive material, and a number of silica microspheres are dispersed inside the flexible piezoresistive material. The printed electrode layer is a patterned screen-printed electrode layer; The patterned screen-printed electrode layer includes a plurality of sensing pattern electrodes, the same number as the ion gel sensing parts. Each sensing pattern electrode includes a comb-shaped electrode part and a strip-shaped electrode part. The comb-shaped electrode part is in direct contact with the ion gel sensing part. The comb-shaped electrode part of each sensing pattern electrode is in one-to-one contact with each ion gel sensing part, thereby converting the heart rate data originally collected by the corresponding ion gel sensing part into an electrical signal. The patterned screen-printed electrode layer also includes a common pattern electrode, which is connected to each sensing pattern electrode respectively. All the strip electrode portions and common pattern electrodes of the patterned screen-printed electrode layer are connected to the control component, thereby sending the electrical signal corresponding to the heart rate data to the control component. The communication component is disposed above the heart rate monitoring component and is used to transmit the heart rate data collected by the heart rate monitoring component to the outside. The power supply component is disposed above the communication component, and supplies power to both the communication component and the control component. The control component is connected to the communication component and the power supply component respectively, and is used to transmit the heart rate data collected by the heart rate monitoring component to the communication component. The wearable component is disposed on the sensor and is used to wear the sensor on the corresponding part of the monitored object.

2. The wearable heart rate monitoring sensor according to claim 1, characterized in that: The patterned screen-printed electrode layer is formed on the substrate layer by screen printing of conductive ink material. The conductive ink material is any one of gold-based conductive ink, silver-based conductive ink, copper-based conductive ink, and carbon-based conductive ink. The substrate layer is a flexible PET substrate layer.

3. The wearable heart rate monitoring sensor according to claim 2, characterized in that: The communication component is a Bluetooth communication component, and the pins of the Bluetooth communication component are soldered to the control component.

4. The wearable heart rate monitoring sensor according to claim 3, characterized in that: The power supply component includes a button battery, which is connected to the communication component and the control component for power supply.

5. The wearable heart rate monitoring sensor according to claim 4, characterized in that: The control components include a main control chip, a power module, a crystal oscillator module, and a reset and indication module; The main control chip is connected to the patterned screen-printed electrode layer and is used to transmit the heart rate data generated by the heart rate monitoring component to the communication component. The power module is a voltage regulator chip, which is connected to the power supply component and supplies power to the main control chip; The crystal oscillator module is a passive crystal oscillator module, which is used to provide clock signals to the main control chip; The reset and indicator module is connected to the main control chip and is used to reset and restart the main control chip and to indicate the operating status of the main control chip with lights.

6. The wearable heart rate monitoring sensor according to claim 5, characterized in that: The wearing component is a flexible bandage with Velcro.

7. A method for preparing a wearable heart rate monitoring sensor as described in any one of claims 1-6, characterized in that, It includes the following steps: Step S1: A flexible encapsulation layer is made using a flexible material, and at least one opening is formed on the flexible encapsulation layer; ion gel is injected into each opening, thereby forming an ion gel sensing part on each opening; Step S2: A base layer is made of a flexible material, and a printed electrode layer is formed on one side surface of the base layer by screen printing; then the flexible encapsulation layer and the base layer are stacked together so that the printed electrode layer is in direct contact with the ion gel sensing part, thereby forming a heart rate monitoring component; Step S3: Solder the control component to the printed electrode layer of the heart rate monitoring component, and connect the control component to the communication component; Step S4: Connect both the control component and the communication component to the power supply component, so that the heart rate monitoring component, the communication component and the power supply component are stacked sequentially from bottom to top; Step S5: The wearable component is placed on the sensor to enable the sensor to be worn repeatedly.

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